Question

Which element has
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2, 8, 2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as its first shell?

Answer 1

ANSWER:

a.Neon

b.magnesium

c.silicon

d.boron

e.carbon

Answer 2

$\huge\mathfrak{Answer→}$

a) Neon has two shells which are completely filled.

b) Silicon has the electronic configuration 2, 8, 2

c) Carbon has a total of three shells, with four electrons in its valence shell

d) Boron a total of two shells, with three electrons in its valence shell

e) Magnesium has twice as many electrons in its second shell as in its first shell